When do I test again?

Destini • Mother of two trying for baby number 3!!!!!

So yesterday I took an 88cent Walmart test an I feel like I see a vvvfl, especially when I look at it as a negative photo. I was 13DPO yesterday. When should I test again? My period is suppose to start tomorrow and so far no sign of AF. I’m trying not to get my hopes up. Picture is it test from yesterday